Tex. R. Civ. P. 675
The clerk of the court or the justice of the peace, on receiving certified copies filed in the county of the garnishee's residence under the provisions of the statutes, shall docket the case in the name of the plaintiff as plaintiff, and of the garnishee as defendant, and issue a notice to the garnishee, stating that his answer has been so controverted, and that such issue will stand for trial on the docket of such court. Such notice shall be directed to the garnishee, be dated and tested as other process from such court, and served by delivering a copy thereof to the garnishee. It shall be returnable, if issued from the district or county court, at ten o'clock a.m. of the Monday next after the expiration of twenty days from the date of its service; and if issued from the justice court, to the next term of such court convening after the expiration of twenty days after the service of such notice.
Tex. R. Civ. P. 675